Raison d'Être

"Raison d'Être" is performed by Rie Tanaka and was used as the first ending theme for the 2002 television anime Chobits (ちょびっツ), produced by Madhouse. Tanaka also voices Chii in the series.

The song was released on 22 May 2002 on the single Chobits Ending Theme Raison D'etre - Single. Victor Entertainment issued the release in 2002.